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Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

Postal Subscription Code 80-972

2018 Impact Factor: 1.701

Front. Energy    2019, Vol. 13 Issue (1) : 131-148    https://doi.org/10.1007/s11708-017-0446-x
RESEARCH ARTICLE
Intelligent hybrid power generation system using new hybrid fuzzy-neural for photovoltaic system and RBFNSM for wind turbine in the grid connected mode
Alireza REZVANI1(), Ali ESMAEILY2, Hasan ETAATI3, Mohammad MOHAMMADINODOUSHAN4
1. Department of Electrical Engineering, Saveh Branch, Islamic Azad University, Saveh 3919715179, Iran Water and Power Resources Development Company (IWPCO), Iran
2. Department of Electrical Engineering, Karaj Branch, Islamic Azad University, Karaj 3148635731, Iran
3. Iran Water and Power Resources Development Company (IWPCO), Iran
4. Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran
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Abstract

Photovoltaic (PV) generation is growing increasingly fast as a renewable energy source. Nevertheless, the drawback of the PV system is intermittent because of depending on weather conditions. Therefore, the wind power can be considered to assist for a stable and reliable output from the PV generation system for loads and improve the dynamic performance of the whole generation system in the grid connected mode. In this paper, a novel topology of an intelligent hybrid generation system with PV and wind turbine is presented. In order to capture the maximum power, a hybrid fuzzy-neural maximum power point tracking (MPPT) method is applied in the PV system. The average tracking efficiency of the hybrid fuzzy-neural is incremented by approximately two percentage points in comparison with the conventional methods. The pitch angle of the wind turbine is controlled by radial basis function network-sliding mode (RBFNSM). Different conditions are represented in simulation results that compare the real power values with those of the presented methods. The obtained results verify the effectiveness and superiority of the proposed method which has the advantages of robustness, fast response and good performance. Detailed mathematical model and a control approach of a three-phase grid-connected intelligent hybrid system have been proposed using Matlab/Simulink.

Keywords photovoltaic      wind turbine      hybrid system      fuzzy logic controller      genetic algorithm      RBFNSM     
Corresponding Author(s): Alireza REZVANI   
Online First Date: 24 February 2017    Issue Date: 20 March 2019
 Cite this article:   
Alireza REZVANI,Ali ESMAEILY,Hasan ETAATI, et al. Intelligent hybrid power generation system using new hybrid fuzzy-neural for photovoltaic system and RBFNSM for wind turbine in the grid connected mode[J]. Front. Energy, 2019, 13(1): 131-148.
 URL:  
https://academic.hep.com.cn/fie/EN/10.1007/s11708-017-0446-x
https://academic.hep.com.cn/fie/EN/Y2019/V13/I1/131
Fig.1  Equivalent circuit of one PV array
IMP ( Rated current)/AVMP( Rated voltage)/VPmax(Rated power)/WVoc ( Open circuit voltage)Isc ( Short circuit current)Np (number of parallel cells)Ns (number of series cells)
4.9418.659022.325.24136
Tab.1  Red sun 90 W module under STC
Number of design variablePopulation sizeCrossover constant/%Mutation rate/%Maximum generations
120801020
Tab.2  Genetic algorithm parameters
Fig.2  Diagram of the discussed method
Fig.3  Structure of fuzzy-neural hybrid method
Fig.4  The membership function of fuzzy logic
Rule number?Ppv?Vpv?ref
1PPP
2PNN
3NPN
4NNP
1PPP
Tab.3  Fuzzy rules
Fig.5  
Fig.6  
Fig.7  Training data of ANN controller
Fig.8  Validation data of ANN controller
Fig.9  Testing data of ANN controller
Fig.10  Simulated results of variations of irradiance) in case 1
AlgorithmTracking efficiency (avg)Response time (avg)/sOscillation around MPP (avg)/W
Hybrid fuzzy-neural99.120.102.52
Fuzzy logic97.350.177.31
P&O95.140.2829.12
Tab.4  Tracking efficiency and response time comparison for different MPPT techniques under irradiance variation
Time/sReal value/ WHybrid fuzzy-neural/WFuzzy logic/WP&O/W
0–41600159815551533
4–83530352734703455
8–111600159815551533
11–1444004398434844331
Tab.5  Output power values of solar array (watt) in various irradiation conditions
Fig.11  Simulated results for wind system in case1
Fig.12  Simulated results of variations of irradiance) in case 2
AlgorithmTracking efficiency ( avg)Response time (avg)/sOscillation around MPP (avg)/W
Hybrid fuzzy-neural99.450.142.12
Fuzzy logic97.620.197.21
P&O94.840.2726.12
Tab.6  Tracking efficiency and response time comparison for different MPPT techniques under temperature variation
Time/sReal value/WHybrid fuzzy-neural/WFuzzy logic/WP&O/W
0–44298429742614246
8–141952194919041887
Tab.7  Output power values of solar array (watt) in various temperature conditions
Fig.13  Simulated results for wind system in case 2
Controller typeWind speed/(m·s–1)Power coefficient (Cp)Pitch angle/(°)Average power/kW
RBFNSM120.475–0.0959.2
PI120.461–0.6658.1
Tab.8  Performance comparison of RBFNSM and PI Controller
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